STEREO Weekly Meeting Minutes for 2025-01-14 (Week 3) ANNOUNCEMENTS ------------- * Reminder: Dan Wilson will be preparing an annual spacecraft health assessment. All of the instrument teams should have received an email requesting a short slide deck to be provided by January 31, if possible. * DSN is trying to increase available downlink time by shortening the time allotted for track setup from 1 hour to 45 minutes. These changes are reflected in the track schedules beginning in week 5. INSTRUMENT and SPACECRAFT STATUS -------------------------------- * Ahead is operating nominally. PLASTIC is in operational mode, but with a moderately higher than normal background rate. * Four years after the initial loss of communications anomaly with the Behind observatory, NASA has directed to cease periodic recovery operations with the last support on October 17, 2018. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 2 (Jan 6-12) * On day 006 (Jan 6), during the DSS-54 support, the antenna was declared red due to a X-band Feed Mirror problem. This anomaly resulted in the loss of four hours of real-time telemetry, commanding, tracking and SSR data. The MOPs team repositioned the SSR pointers during the subsequent DSS-35 track and recovered all the affected data. See DR #M117595 for more information. * On day 007 (Jan 7), during the DSS-54 support, the antenna was declared red due to a X-band Feed Mirror problem. This anomaly resulted in the loss of 3.9 hours of real-time telemetry, commanding, tracking and SSR data. The MOPs team disabled the SSR playback prior to the track and recovered all the affected data during the subsequent DSS-25 track. See DR #M117601 for more information. * On day 007 (Jan 7), the 173rd momentum dump was executed successfully at 18:00 UT, which imparted an estimated delta V of 0.058 m/sec. This was the 92nd momentum dump conducted without gyro use. After thruster operations completed, there was a 0.6 degree of roll angle error. Fine pointing stabilized three minutes after completion of the momentum dump. * On day 008 (Jan 8), during the DSS-36 support, due to the wildfires in California, DSN moved operations from the JPL DSOC in Pasadena to the Emergency Control Center (ECC) in Goldstone. This move impacted the STEREO MOC operations because the MOC does not have network capability with the ECC. Therefore, the MOC did not have access to DSN tracks (Telemetry & Command) during the outage for DOY 008-17:00 to DOY 010-21:30 UT. Although MOC-DSN network connectivity was unavailable, the DSN antennas continued to successfully track the spacecraft and store telemetry locally. See DR #N113414 for more information. * On day 010 (Jan 10), during the DSS-54 support, the MOC was able to establish a command link at 06:14 UT to send six commands in the blind. Two of the commands were downlink rate changes, which allowed the MOPs team to have the station confirm the loss and re-acquisition of frame lock on the downlink to verify a good command uplink. The downlink rate change caused six minutes of data loss for SECCHI on day 009 from 21:22 to 21:28 UT. * On day 010 (Jan 10), DSN moved operations back to the JPL DSOC in Pasadena at 21:30 UT. DSN transferred the missing telemetry data to the MOC on day 011 at 01:00 UT, and the data was reprocessed for Jan 8th thru Jan 10th. The MOC had the first nominal track with command and telemetry connectivity via DSS-65 on Jan 11th at 05:50 UT. * On day 011 (Jan 11), during the DSS-35 support, the antenna was declared red due to pedestal water flooding. This anomaly resulted in the loss of two hours of real-time telemetry, commanding, tracking and SSR data. The MOPs team repositioned the SSR pointers during the subsequent DSS-55 track and recovered all the affected data. See DR #C118227 for more information. * The average daily science data return for Ahead was 8.0 Gbits during this week. Week 3 (Jan 13-19) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. * SECCHI will be collecting extra HI1 images January 15 through 21 to observe Comet C/2024 G3 (Atlas). Week 4 (Jan 20-26) * Ahead has twelve passes during the week, all at 720 kbps, and overall coverage is nominal. * APL will be closed on Monday, January 20, for the Martin Luther King, Jr holiday. Week 5 (Jan 27 - Feb 2) * Ahead has twelve passes during the week, all at 720 kbps, and overall coverage is nominal. Week 6 (Feb 3-9) * Ahead has fourteen passes during the week, all at 720 kbps, and overall coverage is nominal. * There is a DSN network maintenance event scheduled for Wednesday, February 5. Week 7 (Feb 10-16) * Ahead has fifteen passes during the week, all at 720 kbps, and overall coverage is nominal. Week 8 (Feb 17-23) * Ahead has thirteen passes during the week, all at 720 kbps, and overall coverage is nominal. * Solar Orbiter will have a Venus flyby on Tuesday, February 18. STEREO does not currently have any special observations planned for this event. * A momentum dump will likely be added to this schedule. Other COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 03: M Jan 13 (013) T Jan 14 (014) W Jan 15 (015) G3 ATLAS observations T Jan 16 (016) F Jan 17 (017) S Jan 18 (018) S Jan 19 (019) Notes: * HI1-A 20-min cadence campaign from 1/15 0000 to 1/21 00:00 ------------------------------------------------------------------------------- Scheduled activities for Week 04: M Jan 20 (020) Martin Luther King, Jr. holiday T Jan 21 (021) W Jan 22 (022) T Jan 23 (023) F Jan 24 (024) S Jan 25 (025) S Jan 26 (026) Notes: * HI1-A 20-min cadence campaign from 1/15 0000 to 1/21 00:00 ------------------------------------------------------------------------------- Scheduled activities for Week 05: M Jan 27 (027) T Jan 28 (028) W Jan 29 (029) T Jan 30 (030) F Jan 31 (031) S Feb 01 (032) S Feb 02 (033) ------------------------------------------------------------------------------- Scheduled activities for Week 06: M Feb 03 (034) T Feb 04 (035) W Feb 05 (036) T Feb 06 (037) F Feb 07 (038) S Feb 08 (039) S Feb 09 (040) ------------------------------------------------------------------------------- Scheduled activities for Week 07: M Feb 10 (041) T Feb 11 (042) W Feb 12 (043) T Feb 13 (044) F Feb 14 (045) S Feb 15 (046) S Feb 16 (047) ------------------------------------------------------------------------------- Scheduled activities for Week 08: M Feb 17 (048) T Feb 18 (049) Solar Orbiter Venus flyby W Feb 19 (050) T Feb 20 (051) F Feb 21 (052) S Feb 22 (053) S Feb 23 (054) Upcoming events: 2025: * Mar 3-4 STEREO Instrument Teams Hybrid Meeting @ APL * Mar 11-28 Solar Orbiter Remote Sensing Window 19 * Mar 19-27 Parker Solar Probe perihelion pass * Mar 29-Apr 6 Solar Orbiter Remote Sensing Window 20 * Apr 7 Ahead: Mercury transit * Apr 25-30 Solar Orbiter Remote Sensing Window 21 * Jun 15-24 Parker Solar Probe perihelion pass * Sep 7-12 Solar Orbiter Remote Sensing Window 22 * Sep 13-23 Solar Orbiter Remote Sensing Window 23 * Sep 12-20 Parker Solar Probe perihelion pass * Oct 1-6 Solar Orbiter Remote Sensing Window 24 * Dec 9-17 Parker Solar Probe perihelion pass 2026: * Mar 8-16 Parker Solar Probe perihelion pass * Jun 4-12 Parker Solar Probe perihelion pass * Sep 1-9 Parker Solar Probe perihelion pass * Nov 28-Dec 6 Parker Solar Probe perihelion pass * Dec 24 Solar Orbiter Venus flyby 2028: * Mar 18 Solar Orbiter Venus flyby 2029: * Jun 10 Solar Orbiter Venus flyby * Jun 30 Ahead: Mercury transit 2030: * Sep 3 Solar Orbiter Venus flyby ######################################################################## Access the STEREO-SCI-OPS Home Page and Archives: http://listserv.jhuapl.edu/scripts/wa.exe?A0=STEREO-SCI-OPS Unsubscribe from the STEREO-SCI-OPS List: http://listserv.jhuapl.edu/scripts/wa.exe?TICKET=NzM5MjQ2IHNoYWVsYS5pLmpvbmVzbWVjaG9sc2t5QE5BU0EuR09WIFNURVJFTy1TQ0ktT1BTID6aADWmLhmq&c=SIGNOFF ########################################################################